Gas-air burner provided with antiflashback member



Jan. 15, 1952 J. s. ZINK ETAL 2,582,577

GAS-AIR BURNER PROVIDED WITH ANTIFLASHBACK MEMBER Filed Sept. 25, 1947 2 SHEETSSHEET l IN V EN TORS .1. s. Z/NK R. 0. REED,

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ATTORN Y Jan. 15, 1952 N E AL 2,582,577

GAS-AIR BURNER PROVIDED WITH ANTIFLASHBACK MEMBER Filed Sept. 25, 1947 2 SHEETSSHEET 2 INVENTORS J. 5. Z/NK R. 0. REED,

BY M6 W AZ'TOR E) Patented Jan. 15, 1952 GAS-AIR BURNER PROVIDED WITH ANTI- FLASHBACK MEIVIBER John s. Zink and Robert D. Reed, Tulsa, Okla.; said Reed assignor to said Zink Application September 25, 1947, Serial No. 776,116

. 2 Claims.

This invention relates to improvements in burners of the type employed in the burning of gas-air mixtures, and more particularly to burners for this purpose of the kind including an anti-flashback screen to prevent ignition until the mixture arrives in the combustion space of the furnace or the like.

One of the objects of the invention is to provide a burner of this character having cooling fins or their equivalent rigidly united therewith.

A further object is to provide a burner of this character in which the solid sections of the screen between the gas-air ports may be equal to, or greater than, the areas of the ports, to provide a more sturdy construction.

A still further object is to provide a burner of this kind which may be shipped without special crating or packing, as the burner head may be mission of secondary air, if required, although the burner is so designed that it may be sealed to the furnace wall so that all air is entrained with the gas and discharged through the gas-air ports.

Another object is to provide such a burner with means for regulating the admission of the secondary air, if secondary air is employed.

With the foregoing objects outlined and with other objects in view which will appear as the description proceeds, the invention consists in the novel features hereinafter described in detail, illustrated in the accompanying drawings, and more particularly pointed out'in the appended claims.

Inthe drawings:

Fig. 1 is a side elevation, partly in longitudinal diametrical section, of our burner, shown extending into an admission port of a furnace or the like.

Figs. 2 and 3 are transverse sectional views taken, respectively, on the lines 2-2 and 3-3 of Fig. 1.

Fig. 4 is an end elevational view taken from the combustion space of the furnace or the like.

Fig. 5 is a similar view taken from the exterior of the furnace and showing the secondary air control door, partly broken away to reveal the secondary air ports of the burner.

Fig. 6 is a view similar to Fig. 5 with the door omitted and showing secondary air slots employed instead of ports.

Referring to the drawings, 1 designates a wall of a furnace provided with an admission port 8 into which extends our improved burner, indicated generally at 9. As exemplified in the drawings, the burner preferably consists of a tubular head or screen I l which forms a closure for that.

end of the tube, but is provided with circular series of gas-air discharge ports l2. As heretofore mentioned, the solid sections of the head or screen between the ports may be equal to, or greater than, the areas of the ports, due to other features of our invention. 7

Within the tube and rigidly united with the head, is a series of concentric collars I3 providing a number of concentric annular passageways I4, communicating with the circular series of ports in the head. The parts 13 not only function as fins for cooling the head, but act to streamline the gas-air mixture in its passage through each series of ports [2.

At the end of the tubular wall opposite that where the head I l is located, we provide an outwardly extending flange l5, preferably provided with about four apertures [6 for the reception of screws I1 employed in detachably securing the burner to the metallic casing ill of the furnace.

The flange is desirably provided with openings I9 through which secondary air may be admitted into the admission port 8 at the exterior of the tubular member [0, if desired, and the ports may be controlled by an annular door 20 which is slidably mounted on the Venturi tube 2| which is screwed into a boss 22 at the intake end. of the burner.

The openings 19 may be in the form of a circular series of ports 23, as shown in Fig. 5, or in the form of arcuate slots 24, as illustrated in Fig. 6. Regardless of which form is used, the secondary air will travel through an annular passageway 26 formed between the exterior of the tube l0 and the inner surface of the admission port 8.

We preferably provide the exterior of the tube with heat dissipating means, such as radial fins 25 which extend into the annular space 26 between the tube IO and the inner surface of the admission port, and which fins will be cooled by the secondary air in the event such air is admitted through the openings IS.

The intake end 2'! of the Venturi tube is preferably provided with an air admission opening 28 into which the gas discharge nozzle 29 extends, and it is obvious that the discharge of fuel gas from the nozzle into the Venturi tube will induce the flow of air into said tube. For regulating the ing 8 large enough to receive it. The burner is shown in a round opening which has substantially the same diameter as the burner head, but it is obvious this opening may be of various shapes, that is square, hexagonal, octagonaLtor generally irregular in any way. The burner may be mounted in any position to direct the fire in any direction It is readily adaptable for the burning-of any gases because of the provision for the admission of secondary air. As an example, if the burner is designed for use with naturalgas ancl'no-provision were made for the entrance of secondary air, it would not operate onfull capacity with butane because an insulficint volume of primary air wouldbe induced by the butane,

It'willbe noted that in keeping with our invention, there is nonecessity for having the gasair ports l2; parallel as they may be shaped to permit straight-forward, convergent or divergent flame patterns.

Ifthe'ports should become plugged by combustible matter, or if solids should be encased in a matrix of' combustible matter in the ports l2,

the obstruction may be removed by simply puttin-gv the head; in a furnace to burn out the foreign" matter.

"It is obvious that the means for" delivering a gas-air mixture .to the burner may beat variance with that shown, and any conventional means might'be employed! It. will also be apparent that the burner" adaptable for either high or low pressure gas operation. V

While we; havedisclosed what we. now consider tobea preferred embodiment ofthe invention, in such manner that the same may be readily understood by those skilled in the art, we are aware; that changes may be made in the details. disclosed, without departing from the spirit ofJthe invention; as. expressed in the following claims; 7

What we claim and desire to secure by Letters Patent is:

. 1'. A gas. burner for furnaces comprising, a. tubular member adapted to extend into a port of a 'furnacewall, a burner head; closing. an inner end of said tubularmember, said'burner head having ports therethrough circumferentially spaced from each other and" arranged in a circle concentric to the axis of a tubular member, a heat conducting collar rigidly secured in heat conducting relation to the inner face of the burner head with the axis of the collar aligned with the axis of the tubular member and having a diameter smaller than the said circle ports so that the ports are in open communication with an annular space between the tubular member and the heat conducting collar, means for supplying a gaseous fuel mixture into the tubular member, circumferentially spaced longitudinally extending heat conducting fins projecting radially outward from the periphery of the tubular member, and means for controlling the admissienofair to spaces between said fins.

2. A gas burner for furnaces comprising, a tubular member adapted to extend into a port of a ilurnace wall, a burner head closing an inner end of said tubular member, said burner head having ports therethrough circumferentially spaced from eachbther and arranged in a circle concentric of the axis of the tubular member, said burner'head having additional ports therethrough circumferentially spaced from each other and arranged in a smaller circle concentric of the axis of the tubular member, a heat conducting collar rigidly secured in heat conducting relation to the inner face of the burner head with the axis thereof aligned with the axisof the tubular member and arranged ifntermediate the tubular member and the second circle of ports, a second heat conducting collar rigidly secured in. heat conducting relation to the inner face of the burner headwith the axis thereof aligned with the axis of the tubular .member, said second heat conducting collar being of smaller diameter than the second circle of ports, circumferentially spaced longitudinal heat conducting fins extending radially and outwardly" from the periphery of the .tubularmemben, a

, flange carried by the tubular member" adapted toclose the port in .thei'u'rnace Wa ll, said flange,

having openings" therethrough communicating with spaces between said. radial fins, and means for supplying a gaseous fuel and air mixture into,

the tubular member. 7

JOHNS; ZINK. ROBERT D. REED. REFERENCES CITED The. following. references. are of recordin th file of this patent:

'UNITEDSTATES' PATENTS v Date Number Name. 541,533 Haffcke s June. 5,1895 624,071 .McCartney May 2; 1899 1,841,169 Butz Jan. 12,1932 1,862,673 Foster June 14,. I932 1,947,866 McCourt Feb. 20, 1934 2,011,283- Hmr .Aug. 13, 1935. 

